https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91947
Bug ID: 91947
Summary: std::filesystem::file_size will return wrong value on
32bit platforms with large files support
Product: gcc
Version: 8.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: fregloin at gmail dot com
Target Milestone: ---
std::filesystem::file_size will return wrong value on 32bit platforms with
large files support
/trunk/libstdc++-v3/src/filesystem/ops.cc
/trunk/libstdc++-v3/src/filesystem/std-ops.cc (the same problem)
struct S field `size` of type `size_t`.
When it casted from uintmax_t to size_t on 32bit platform, the result of this
function will be wrong.
fs::file_size(const path& p, error_code& ec) noexcept
{
struct S
{
S(const stat_type& st) : type(make_file_type(st)), size(st.st_size) { }
}
S() : type(file_type::not_found) { }
file_type type;
size_t size;
...
};
stat.off_t type is off64_t when large file support is enabled.
